There wasn't a tutorial for what each tower does or enemy is like, it is somewhat difficult to understand the controls. Besides that, it was fun!
For anyone on PC wondering,
Tab to start the game,
Space is to see your stats,
K to make tower,
J to cancel.
Towers:
The First Tower shoots bullets in a range of 1 around it and shoots 1 at a time.
The Second Tower shoots bullets in a range of 3 and shoots around 16 at once.
The Third Tower is a spike trap that kills the enemy in front of it if it is out. (it goes back and forth)
The Fourth Tower is a cannon that does area damage.